Method of obtaining a mould intended for the manufacture of very small parts

摘要

The mould of this invention is intended for the manufacture of small dimensioned parts, in particular those dimensioned on the order of 0.1 mm or less. It comprises one or several mould shells each of which is obtained by: machining a matrix (100) from a hard material of which at least a portion (104) will have the form of a negative of the desired shell, such portion having dimensions slightly greater than those of the shell to be finally obtained; positioning the matrix within a cavity (106) and obtaining a blank of the shell (116) by injecting a mixture composed of a metallic powder and a binding agent into the cavity; eliminating the binding agent by heating the blank and thereafter subjecting said blank to a sintering operation.